. LIST OF SPECIES. 
130. Dipodomys agilis, Gambel.—Fort Yuma and San Diego, Cal., to San Francisco... 
34. PEROGNATHUS, Maxim. 
a. Perognathus, Max. 
131—Perognathus penicillatus, Woodhouse.—Tuft-tailed Mouse.—San Francisco Moun- 
tains, New Mexico, to Fort Yuma, California, along Colorado.......... ; 
132.—Perognathus fasciatus, Pr. Max.—Fort Union, Nebraska, and Fort Riley, Kansas 
Rewnibonyem ion © Ona hitaerantate antes aa cag oeuetdcneesadcnecasabecedvesdsacage 
133.—Perognathus hispidus, Baird, (n. s.)—Matamoras..........ccccsseceesseerseeeeneeceneeeens 
134.—Perognathus monticola, Baird, (n. s.)—St. Mary’s, Rocky Mountains..........ss00 
b. Cricetodipus, Peale. 
135.—Perognathus flavus, Baird, (n. s.)—Upper Missouri, along eastern slopes of Rocky 
Mountains to Sonora and Chihuahua; and along the Rio Grande to 
NMI baIMONAS Scccasecaamncbacte coneconcaraccenerstnedsaccoscsdceasocceccastssisocsnearenae 
136,—Perognathus parvus, Leconte.—King’s River, California. (Oregon, Peale.)...... 
35. JACULUS, Wagler. 
187,—Jaculus hudsonius.—Jumping Mouse.—Nova Scotia, ae Péennant,) to 
Southern Pennsylvania, and west to the Pacific O@ean...........c.ceeeeeee 
TRIBE MURES. 
36. MUS, Linneus. 
138,—Mus decumanus, Pallas.—Brown Rat.—Throughout North America. (Introduced.) 
139.—Mus rattus, L.—Black Rat.—Throughout North America. (Introduced.).......... 
140.—Mus tectorum, Savi.—White-Bellied Rat ; Roof Rat.—Tar River North Carolina, 
to Georgia ; Northern Mexico. (Introduced.)............ssesseceeeees tosees 
141.—Mus musculus, Linn.—Common Mouse.—North America generally. (Introduced.) 
TRIBE SIGMODONTES. 
37. REITHRODON, Waterhouse. 
142.—Reithrodon humilis. —Harvest Mouse.—South Carolina and Georgia, to St. Louis? 
143.—Reithrodon montanus, Baird, (n.s.)—Rocky Mountains. Lat. 39°..........000000 
144.—Reithrodon megalotis, Baird, (n. s.)—Sonora.........cccsseeeseseecesecececceesseseseenees 
145. Reithrodon longicauda, Baird, (n. s.)—San Francisco and Petaluma, California... 
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